The HI93703 turbidity meter is a portable,
microprocessor-based instrument used
to determine the turbidity of water and
wastewater with high precision in the $eld
as well as in the laboratory.
The HI93703 covers a 0 to 1000 FTU range
in two scales: 0.00 to 50.00 FTU and 50 to
1000 FTU. The auto-ranging feature sets the
appropriate range for the measurement.
The HI93703 has been designed according
to the ISO7027 International Standard,
consequently the turbidity unit is the FTU
(Formazine Turbidity Unit). FTU is equivalent
to the other internationally recognized unit:
NTU (Nephelometric Turbidity Unit).
The meter is very simple to use: all
operations can be carried out with only four
keys and troubleshooting functions can be
performed with displayed error code guides.
The one-point calibration at 10 FTU* can
be easily performed using the available
standard.
Hanna has chosen 10 FTU * as the calibration
point because it is the value that best $ts
the water turbidity measurements in
di&erent applications, from drinking water
to wastewater treatment.
HANNA instruments uses the primary
standard AMCO-AEPA-1 to avoid all
formazine-related problems. Formazine
is a very toxic, unstable substance, which
requires particular care: its standards have
to be prepared only a few minutes before
performing the calibration, and can-not be
reused because of their short life.
Hanna Instruments standards are extremely
stable, can be reused, and last up to six
months if free from contamination.